| 摘要 |
PURPOSE:To provide ink jet recording apparatus evading dot differnce and realizing high quality of printing record by selectively applying pulse voltage in response to print signal to an electrode on the back side of recording paper and ink in a nozzle opposite to the recording paper. CONSTITUTION:Voltage +1KV and -1KV are applied to ink in ink tanks 2,3 fixed each other through an insulative stand 4 by a constant voltage direct current unit 10 and these voltages are applied to switching circuit 17. different colors ink are put into tanks 2,3 and voltage of -1KV is applied to needle back face electrode 16 from a circuit 17 and voltage of 2KV and OV are applied between the electrode 16 and insulative narrow tubes 5,6 respectively and ink is jetted from the tube 5 to record on a recording paper 18. Next, voltage of +1KV is applied to the electrode 16 through the circuit 17 and voltage of OKV and 2KV are applied between the electrode 16 and tubes 5,6 respectively so as to jet ink from the tube 6 to record on the recording paper 18. |
